Oven-door bumper



W. G. MILLER OVEN DOOR BUMPER Filed May 15, 1929 $5 Sheets-Sheet 1 INVEN TOR. Mil/AW M44 4% A omvzy.

Sept. '16, 1930.

Sept. 16, 1930. w G. MILLER 1,776,005

OVEN D'oon BUMPER Filed May 15, 1929 3 Sheets-Sheet 2 A 0 u IZZ/H/H///////////////////f////////////////////////////4L/B 'llll' INV EN TOR.

A TTORNEY.

Sept. 16, 1930. w. G. M|LLER\ 1,776,005

OVEN DOOR-BUMPER 114 um 'ummm' 7 J INVENTOR. Maw/r Maze ATTORNEY.

UNITED STATES Patented Sept. 16,1930

PATENT OFFIOE W LLIAM G. MILLER, OF DETROIT, MICHIGAN, ASSIGNOR TO THER. C. MAHON COM- PANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGANOVEN-DOOR BUT/[PER Application filed May 15, 1929. Serial No. 363,327.

This invention relates to oven door bumpers and the object of theinvention is to provide a bumper for oven doors at the opposite ends ofa drying oven so that a body truck passing through the oven will strikethe bumpers and force the doors open sufficiently to admit the truck andprevent the doors from scratching the automobile bodies mounted on thetrucks.

Another object of the invention is to provide an {oven through whichbody trucks are moved by a conveyor, each truck being arranged tosupport a freshly painted automobile body thereon and the oven doorsbeing provided with bumpers adapted to be engaged by the truck frame andto ride in contact therewith while the truck is passing through the ovendoors, the arrangement being such that the doors when open are held inparallel relation with the oven walls so as to prevent the doorsfromcoming in contact with the automobile body and damaging thefinish'thereon.

Another object of the invention is to provide a spring bumper adapted tobe compressed when the truck strikes the bumper and arranged to be heldunder compression by the truck as the truck moves through the doors, thecompression action of the bumper tending to hold the doors in the wideopen position. 1

A further object of the invention is to provide an oven in which theoven doors automatically. close after the trucks pass there through.

These'objects and the several novel features of the inventionarehereinafter more fully described and claimed and the preferred formof construction by which these objects are attained is shown in theaccompanying drawings in which- Figs. 1 and 1 are plan views of oppositeends of an oven in which the doors are provided with bumpers embodyingmy invention.

Fig. 2 is an enlarged plan view of one of the bumpers.

Fig. 3 is an elevation thereof.

Fig. 4 is a side view of one of the trucks as it moves into contact withthe bumpers.

'ers to open the doors. To illustrate one form of the invention, I haveshown a tunnel type even through which automobile bodies, which havepreviously been spray painted, are moved in order to hasten the dryingof the paint. These bodies are usually moved on tracks on which they aremounted having wheels 1 riding in channel rails 2 extending through theoven. Between the rails 2 a conveyor chain 3 mounted riding in a specialrail 4 and the conveyor chain at intervals is provided with lugs 5 forengaging the trucks as shown in Fig. 5.

The trucks each consist of a rectangular frame 6 shown in Figs. 1 and 4having square ends and provided with brackets 7 on which the supportingbars 8 are mounted and on which the automobile body 9 is positioned.These trucks are preferably provided with four supporting rollers orwheels 1 and the trucks are preferably slightly longer than theautomobile bodies as shown in Fig. 4. The oven, as shown in Figs. 1 and1, may be of the usual form such as a tunnel type oven, as shown, andthe bumpers are mounted on the doors 10 atone end thereof and on I thedoors 11 at the opposite end thereof. These doors are preferablyprovided with spring hinges which act to automatically close the doorsor other spring arrangements may be provided for closing the doors ifdesired. As shown in Fig. 2 a flat strip of steel 12 is secured to theface of the door by the rivets l3 and some of the rivets 13 extendthrough a bracket 14 mounted on the metal isvbent on a radius at 18 toprovidean inwarclly extending end 19. This end 19 ex-.

tends between twosleeves 20 which are mount: edi'n spaced relation onthe bolts QLwhie'h in-= turn are" secured in the bracket 14. s The endlgj'of the member 17 beneaththesleeves 2O is providedvwith a Crossbarf22seeureclthete n to by the rivets 23 and this orossjba yfolpms";

' Et S tOP fOI the member 17"Whiehis presses outwardly bythe coile'c l-sp ingh ls This btse -memb t i {-b ja.oket,a spr1-n metalhuinoen-member pl Oted inthe last named bracket 7 fb'etweenthe sleeves onthe first namedlor a'cket, a Cr0sf ,n ember. SQ1 t e: 5,. he I coiled"spring? 24ris sho'jwil ino-i'e pertictiletrly in Figs. 2' and-3' and isattached to the [Stileone .eiicl' by: the bracket 525- ancl"is'gsectireoleto the' memherl'lfiat' thejopposite end by? thehraeketflfi'. It will thiis be seen that when the elicl ofaboclyltriiek"strikes the c'ufvecl r portion 18.0fthe member 1'? thisinembeifll'? ism'ovedrtowartlfthe door 10 on the 'pijvot'lfi Whi-ohmovenie it is .IfSlStGQlftlUGiO compress ion' ofthe spring- 2413\nd whenthjeIpressu-re f1 j rel eaise'dj the spring 2%; throws the member? V.lTfiOlltWfilCllff;llllftiil-tllQQTOSSYbLI 22 strikes JesZOJonEthe beng, 215.:

let to. the fdotteel F position, shown; in Fig. 1' 1.

' ee' cloors} it w ll be hoted,;a re turned beekza'gaihs't the inheroven wall'tmdlthe; sprihgs24 he btinipeirsare preferably"plaeecl under t-thev n ,:Qfi;the-bumper ember opp e-i1? Iiipression islightlyi whenthe,- body truc ik is iii the, position show iiin lligq 1 'thusFholdlin'g thedeors ide open in the dotted, position. These bumpers arespifieie' tlyg yieldable so that they Will-'13 ages ever the framemembers.- 7 for; agn'yiother "slight obstructjions on the-muck ,fm riiesclue JtoFthe fact that @1658: obstructions ri-(lei up theislopiiigifaees offthe; members 117.

lt-zwillfbe noted thatlby these. door bumpers doors-ehgage Whenintheopenpositiom. I

ancl desire'to secure byLetters Patent of the fUnitedStzites is-' -z YI 1. A door bumper est" attached paths-base;

' s eeves- ASEtlie botliesffinove (loW'ntlie yeon veyor I ine; on the.trucks the end-l ef the truth frame 1 L5 st-rikesjthe:cloof bumpefs onthe doors 10- 1 fclerstood from Fig-5.11 and Y4 sfth'ei'portions'18ofthebumpers'iide 11d the=endsof the.rectangulargframe6 v... e vfixedmelation withlthehclooi a.spring metal wa dm v enwi the ise ol'i i-filp rm m r e V -%-;.1 M0 1? mpe s eaibu pe mw the doors: are spaced,from the automobile" her mounted: on. the; .d O' in -Di0 l;@ti i"bodies; it all times so that there-is: no-pos; ,sibility ofoontjactflbetween the automobile bodies' ztnd the doors to injure: the"finish oh thefbotlies .As the tr ick "passes completely v -iiitoovenheyoncl .the bumpers the doors; a=1 feautomaticallyswung' QlQSQd ispriiig' Y Y hinges as heieihhefore 'desefibed. 1 'Ilriejsahie operation.takes pla ee; at the -clischargef*e1id f,

' Botithe- 'oven showig in Fig.1 and in this-case zigpe'ir of brackets 27 am seeuredato the floor ion joppos'ite rsi cles o fthe'conveyon topro'vide', v @stops' for 'the dojors ,11 and against Whiehth.

"Having thus fully described lilyfinireiitioh; its utility and. modeofoperatiomwhat I claim ber adaptecl for attaehm nt to inb pair of pacedsleeves attached 7, to the uppe threfg ecoIiclflo re ck t attached tothe,

ahd'exte iding tiQn-W th hQQm J reemb 5, 2. Iii eqieloofbum ie a bg i tsid s qendb a ket en' to t ee thsibumpe g m life. oojr lolinlper, a;bracket i mbr p te 'ni hezb mkt nd na n eto eiplel f he 1 p ytibeill lnt/ rinedi 1 66 .16 bte ket i noimt ecl in fixed'relatio with the doe:thegi t il ed 01x1 bra k tv eMebh ails if bumper mem' ve1'"'l outWvolly means 1 1said' i nd 1 k t. time but therewith; at one end' and.extending an 'e i -gle therefrom, atguide hraQket'inOhnted on h fi al- 3l t therewith; 1 h mp nmem. hw hgfe intern f liidjbraolliet, i:

-:#Eromthe ioregoingdescription ithecomes 1 e zielent that'the devicevery simple end I t V e V vLeifioie-nt3in opefatio gfwillnOtea'silygQU'OQt -ie nta ns.r hei o sp eedi rom thebOdy"tlflLClgSgat}fill-times and .proviflesja V v de isewh ch.e ebmp h tj bje S i e n -ii 2S0 e g Q'j; r

